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package fb4java.service;

import fb4java.Facebook4j;
import fb4java.beans.Album;
import fb4java.beans.Comment;
import fb4java.beans.Message;
import fb4java.beans.Note;
import fb4java.beans.Notification;
import fb4java.beans.NotificationStatus;
import fb4java.beans.Post;
import fb4java.beans.Profile;
import fb4java.beans.Status;
import fb4java.beans.Stream;
import fb4java.beans.interfaces.Parameterable;
import fb4java.http.HttpResponseMessage;

import org.apache.http.client.ClientProtocolException;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Date;
import java.util.Map;

/**
 * 
 * fb4java<br />
 * fb4java.service
 * 
 * @author Choongsan Ro
 * @version 1.0 2010. 2. 26.
 */
public class DataRetrievalService extends Service {

    private static final String FRIEND_GET = "friends.get";

    private static final String MESSAGE_GETTHREADSINFOLDER = "Message.getThreadsInFolder";

    private static final String NOTES_GET = "notes.get";

    private static final String NOTIFICATIONS_GET = "notifications.get";
    private static final String NOTIFICATIONS_GETLIST = "notifications.getList";

    private static final String STATUS_GET = "status.get";
    private static final String STREAM_GET = "stream.get";

    private static final String STREAM_GETCOMMENTS = "stream.getComments";

    private static final String USERS_GETINFO = "users.getInfo";
    private static final String USERS_GET_LOGGEDINUSER = "users.getLoggedInUser";
    private static final String USERS_GETSTANDARDINFO = "users.getStandardInfo";
    private static final String USERS_ISAPPUSER = "users.isAppUser";
    private static final String USERS_ISVERIFIED = "users.isVerified";

    /**
     * 
     * @param f4j
     */
    public DataRetrievalService(Facebook4j f4j) {
	super(f4j);
    }

    /**
     * 
     * @return
     * @throws ClientProtocolException
     * @throws URISyntaxException
     * @throws IOException
     * @throws JSONException
     */
    public ArrayList<Parameterable> getFriendList(Class<? extends Parameterable> type) throws ClientProtocolException,
	    URISyntaxException, IOException, JSONException {

	ArrayList<Parameterable> friendList = new ArrayList<Parameterable>();
	ArrayList<Long> friendIds = getFriendsId();
	Long[] friendIdArray = new Long[1];
	friendIdArray = friendIds.toArray(friendIdArray);

	try {
	    getUserInfo(friendIdArray, friendList, type);
	} catch (InstantiationException e) {
	    e.printStackTrace();
	    return null;
	} catch (IllegalAccessException e) {
	    e.printStackTrace();
	    return null;
	}

	return friendList;
    }

    /**
     * 
     * @return
     * @throws ClientProtocolException
     * @throws URISyntaxException
     * @throws IOException
     * @throws JSONException
     */
    public ArrayList<Long> getFriendsId() throws ClientProtocolException, URISyntaxException, IOException,
	    JSONException {
	ArrayList<Long> friendList = new ArrayList<Long>();
	Map<String, String> listOfMethods = getBasicParams();
	listOfMethods.put(METHOD, FRIEND_GET);
	HttpResponseMessage response = f4j.sendGetRequest(listOfMethods);

	JSONArray jArray = new JSONArray(response.getResponse());
	int jArraySize = jArray.length();

	for (int a = 0; a < jArraySize; a++) {
	    friendList.add(jArray.getLong(a));
	}

	return friendList;
    }

    /**
     * This method doesn't work without <b>read_mailbox</b> extended permission
     * 
     * @param folder_id
     *            folder id. It should be one of following : <br/>
     *            0 : Inbox <br />
     *            1 : Outbox <br />
     *            4 : Updates <br/>
     *            Other integers will be treated as empty value.
     * @param uid
     *            user id whose inbox threads you are returning.
     * @param limit
     *            indicates the number of htreads to return.
     * @param offset
     *            indicates how many threads to skip from the most recent thread
     * @throws IOException
     * @throws URISyntaxException
     * @throws ClientProtocolException
     * @throws JSONException
     */
    public void getMessageThreadsInFolder(int folder_id, int uid, int limit, int offset)
	    throws ClientProtocolException, URISyntaxException, IOException, JSONException {
	Map<String, String> listOfMethods = getBasicParams();

	if (folder_id == 0 || folder_id == 1 || folder_id == 4) {
	    listOfMethods.put("folder_id", "" + folder_id);
	}

	if (uid > 0) {
	    listOfMethods.put("uid", "" + uid);
	}
	if (limit > 0) {
	    listOfMethods.put("limit", "" + limit);
	}
	if (offset > 0) {
	    listOfMethods.put("offset", "" + offset);
	}

	listOfMethods.put(METHOD, MESSAGE_GETTHREADSINFOLDER);

	HttpResponseMessage response = f4j.sendGetRequest(listOfMethods);

	JSONObject root = new JSONObject(response.getResponse());
	// TODO response parsing
    }

    public ArrayList<Note> getNotes(long userId) throws ClientProtocolException, URISyntaxException, IOException,
	    JSONException {
	Map<String, String> listOfMethods = getBasicParams();
	ArrayList<Note> rslt = new ArrayList<Note>();

	if (userId > 0) {
	    listOfMethods.put("uid", "" + userId);
	}

	listOfMethods.put(METHOD, NOTES_GET);

	HttpResponseMessage response = f4j.sendGetRequest(listOfMethods);

	JSONArray root = new JSONArray(response.getResponse());
	int numOfNotes = root.length();
	for (int a = 0; a < numOfNotes; a++) {
	    JSONObject aNote = root.getJSONObject(a);
	    rslt.add(new Note(aNote));
	}
	return rslt;
    }

    /**
     * 
     * @param start_time
     * @param include_read
     * @return
     * @throws ClientProtocolException
     * @throws URISyntaxException
     * @throws IOException
     * @throws JSONException
     */
    public ArrayList<Notification> getNotificationList(long start_time, boolean include_read)
	    throws ClientProtocolException, URISyntaxException, IOException, JSONException {
	Map<String, String> listOfMethods = getBasicParams();
	ArrayList<Notification> rslt = new ArrayList<Notification>();

	if (start_time > 0) {
	    listOfMethods.put("start_time", "" + start_time);
	}

	listOfMethods.put("include_read", "" + include_read);

	listOfMethods.put(METHOD, NOTIFICATIONS_GETLIST);

	HttpResponseMessage response = f4j.sendGetRequest(listOfMethods);

	JSONObject root = new JSONObject(response.getResponse());
	JSONArray notificationArr = root.getJSONArray("notifications");
	for (int a = 0; a < notificationArr.length(); a++) {
	    JSONObject aNotification = notificationArr.getJSONObject(a);
	    rslt.add(new Notification(aNotification));
	}
	return rslt;
    }

    public NotificationStatus getNotifications() throws ClientProtocolException, URISyntaxException, IOException,
	    JSONException {
	Map<String, String> listOfMethods = getBasicParams();

	listOfMethods.put(METHOD, NOTIFICATIONS_GET);

	HttpResponseMessage response = f4j.sendGetRequest(listOfMethods);

	JSONObject root = new JSONObject(response.getResponse());
	return new NotificationStatus(root);
    }

    /**
     * It retrieves logged-in user's status.
     * 
     * @param limit
     *            Number of status to be returned. Default value is 100.
     * @return status list
     * @throws ClientProtocolException
     * @throws URISyntaxException
     * @throws IOException
     * @throws JSONException
     * @throws JSONException
     */
    public ArrayList<Status> getStatus(int limit) throws ClientProtocolException, URISyntaxException, IOException,
	    JSONException {
	ArrayList<Status> rtnValue = new ArrayList<Status>();
	Map<String, String> listOfMethods = getBasicParams();

	if (limit > 0) {
	    listOfMethods.put("limit", "" + limit);
	}

	listOfMethods.put(METHOD, STATUS_GET);

	HttpResponseMessage response = f4j.sendGetRequest(listOfMethods);

	JSONArray jArray = new JSONArray(response.getResponse());
	int arraySize = jArray.length();

	for (int a = 0; a < arraySize; a++) {
	    JSONObject jObj;
	    try {
		jObj = jArray.getJSONObject(a);

		rtnValue.add(new Status(jObj.getLong("uid"), jObj.getLong("source"), jObj.getLong("status_id"),
			new Date(jObj.getLong("time") * 1000), jObj.getString("message")));
	    } catch (JSONException e) {
		e.printStackTrace();
	    }
	}

	return rtnValue;
    }

    /**
     * 
     * @return
     * @throws ClientProtocolException
     * @throws URISyntaxException
     * @throws IOException
     * @throws JSONException
     */
    public Stream getStream() throws ClientProtocolException, URISyntaxException, IOException, JSONException {
	return getStream(-1, null, -1, -1, -1, null, null);
    }

    /**
     * 
     * @param viewerId
     *            The user ID for whom you are fetching stream data. You can
     *            pass 0 for this parameter to retrieve publicly viewable
     *            information. However, desktop applications must always specify
     *            a viewer as well as a session key. (Default value is the
     *            current session user.)
     * @param srcIds
     *            An array containing all the stream data for the user profiles,
     *            Pages, groups, and events connected to the viewer_id. You can
     *            filter the stream to include posts by the IDs you specify
     *            here. (Default value is all connections of the viewer.)
     * @param startTime
     *            The earliest time (in Unix time) for which to retrieve posts
     *            from the stream. The start_time uses the updated_time field in
     *            the stream (FQL) table as the baseline for determining the
     *            earliest time for which to get the stream. (Default value is 1
     *            day ago.)
     * @param endTime
     *            The latest time (in Unix time) for which to retrieve posts
     *            from the stream. The end_time uses the updated_time field in
     *            the stream (FQL) table as the baseline for determining the
     *            latest time for which to get the stream. (Default value is
     *            now.)
     * @param limit
     *            A 32-bit int representing the total number of posts to return.
     *            (Default value is 30 posts.)
     * @param filterKey
     *            A filter associated with the user. Filters get returned by
     *            stream.getFilters or the stream_filter FQL table. To filter
     *            for stream posts from your application, look for a filter with
     *            a filter_key set to "app_YOURAPPLICATIONID".
     * @param metadata
     *            A JSON-encoded array in which you can specify one or more of
     *            the following when you call stream.get: <br>
     *            <li>albums -- to request the user's aid (album ID)</li> <br>
     *            <li>profiles -- to request the user's ID (user ID or Page ID)</li>
     * <br>
     *            <li>photo_tags to request the user's pid (photo ID)</li> <br>
     *            <li>strip_tags(field) -- to strip out any HTML markup and
     *            encoding in an attachment field. You can specify this function
     *            more than once if you want to remove markup from multiple
     *            fields.</li> <br>
     *            These parameters are all optional. (Default value is false for
     *            all keys.)
     * @return
     * @throws IOException
     * @throws URISyntaxException
     * @throws ClientProtocolException
     * @throws JSONException
     */
    public Stream getStream(long viewerId, JSONArray srcIds, long startTime, long endTime, int limit, String filterKey,
	    JSONArray metadata) throws ClientProtocolException, URISyntaxException, IOException, JSONException {
	Stream stream = new Stream();
	Map<String, String> listOfMethods = getBasicParams();

	if (viewerId >= 0) {
	    listOfMethods.put("viewer_id", "" + viewerId);
	}
	if (srcIds != null && srcIds.length() > 0) {
	    listOfMethods.put("source_ids", srcIds.toString());
	}
	if (startTime > 0) {
	    listOfMethods.put("start_time", "" + startTime);
	}
	if (endTime > 0) {
	    listOfMethods.put("end_time", "" + endTime);
	}
	if (limit > 0) {
	    listOfMethods.put("limit", "" + limit);
	}
	if (filterKey != null && !filterKey.trim().equals("")) {
	    listOfMethods.put("filter_key", filterKey);
	}

	if (metadata != null && metadata.length() > 0) {
	    listOfMethods.put("metadata", metadata.toString());
	}

	listOfMethods.put(METHOD, STREAM_GET);

	HttpResponseMessage response = f4j.sendGetRequest(listOfMethods);

	JSONObject root = new JSONObject(response.getResponse());

	// lists that stream can hold
	ArrayList<Post> postList = new ArrayList<Post>();
	ArrayList<Album> albumList = new ArrayList<Album>();
	ArrayList<Profile> profileList = new ArrayList<Profile>();

	// handle posts
	try {
	    Object postListObj = root.opt("posts");
	    if (postListObj != null && postListObj instanceof JSONArray) {
		JSONArray posts = (JSONArray) postListObj;
		int postSize = posts.length();
		for (int a = 0; a < postSize; a++) {
		    JSONObject jObj = posts.getJSONObject(a);
		    Post p = new Post();
		    p.postId = jObj.getString("post_id");
		    p.viewerId = jObj.getLong("viewer_id");
		    p.sourceId = jObj.getLong("source_id");
		    p.type = jObj.getInt("type");
		    // jObj.getLong("app_id");
		    p.actorId = jObj.getLong("actor_id");
		    p.targetId = jObj.getString("target_id");
		    p.message = jObj.getString("message");
		    JSONObject comments = jObj.getJSONObject("comments");
		    p.numOfComments = comments.getInt("count");
		    Object chkCmtObj = comments.get("comment_list");

		    if (chkCmtObj instanceof JSONArray) {

			JSONArray commentArray = comments.getJSONArray("comment_list");

			int commentsSize = commentArray.length();
			if (commentsSize > 0) {
			    ArrayList<Comment> commentList = new ArrayList<Comment>();
			    for (int b = 0; b < commentsSize; b++) {
				JSONObject comment = commentArray.getJSONObject(b);
				Comment co = new Comment();
				co.fromid = comment.getLong("fromid");
				co.time = new Date(comment.getLong("time") * 1000);
				co.message = comment.getString("text");
				co.id = comment.getString("id");
				commentList.add(co);
			    }
			    p.comments = commentList;
			}
		    }
		    p.updateDate = new Date(jObj.getLong("updated_time") * 1000);
		    p.creationDate = new Date(jObj.getLong("created_time") * 1000);
		    postList.add(p);
		}
	    }
	} catch (JSONException jsone) {
	    jsone.printStackTrace();
	}

	// handle albums
	try {
	    Object albumListObj = root.opt("albums");
	    if (albumListObj != null && albumListObj instanceof JSONArray) {
		JSONArray albums = (JSONArray) albumListObj;
		int albumsSize = albums.length();
		for (int a = 0; a < albumsSize; a++) {
		    JSONObject jObj = albums.getJSONObject(a);

		    Album album = new Album();
		    album.aid = jObj.getString("aid");
		    album.coverPid = jObj.getString("cover_pid");
		    album.owner = jObj.getLong("owner");
		    album.name = jObj.getString("name");
		    album.created = new Date(jObj.getLong("created") * 1000);
		    album.modified = new Date(jObj.getLong("modified") * 1000);
		    album.description = jObj.getString("description");
		    album.link = jObj.getString("link");
		    album.objectId = jObj.getLong("object_id");
		    album.modifiedMajor = new Date(jObj.getLong("modified_major") * 1000);
		    album.type = jObj.getString("type");
		    albumList.add(album);
		}
	    }
	} catch (JSONException jsone) {
	    jsone.printStackTrace();
	}

	// handle profiles
	try {
	    Object profileListObj = root.opt("profiles");
	    if (profileListObj != null && profileListObj instanceof JSONArray) {
		JSONArray profiles = (JSONArray) profileListObj;
		int profileSize = profiles.length();
		for (int a = 0; a < profileSize; a++) {
		    JSONObject jObj = profiles.getJSONObject(a);
		    Profile p = new Profile();
		    p.id = jObj.getLong("id");
		    p.url = jObj.getString("url");
		    p.name = jObj.getString("name");
		    p.picSquare = jObj.getString("pic_square");
		    p.type = jObj.getString("type");
		    profileList.add(p);
		}
	    }
	} catch (JSONException jsone) {
	    jsone.printStackTrace();
	}

	// handle photo_tags
	// not implemented yet
	// try {
	// JSONArray photoTags = root.getJSONArray("photo_tags");
	// int photoTagsSize = photoTags.length();
	// for (int a = 0; a < photoTagsSize; a++) {
	// // JSONObject jObj = photoTags.getJSONObject(a);
	// }
	// } catch (JSONException jsone) {
	// jsone.printStackTrace();
	// }

	stream.postList = postList;
	stream.albumList = albumList;
	stream.profileList = profileList;

	return stream;
    }

    /**
     * 
     * @param postId
     * @return
     * @throws ClientProtocolException
     * @throws URISyntaxException
     * @throws IOException
     * @throws JSONException
     */
    public ArrayList<Comment> getStreamComment(String postId) throws ClientProtocolException, URISyntaxException,
	    IOException, JSONException {
	if (postId == null || postId.trim().equals("")) {
	    throw new IllegalArgumentException("Argument 'postId' is null. Please insert postId.");
	}

	ArrayList<Comment> commentList = new ArrayList<Comment>();
	Map<String, String> listOfMethods = getBasicParams();

	listOfMethods.put(METHOD, STREAM_GETCOMMENTS);
	listOfMethods.put("post_id", postId);

	HttpResponseMessage response = f4j.sendGetRequest(listOfMethods);
	String output = response.getResponse().trim();

	if (output != null && !output.equals("") && output.charAt(0) != '{') {

	    JSONArray jArray = new JSONArray(output);
	    int arrSize = jArray.length();
	    for (int a = 0; a < arrSize; a++) {
		JSONObject jObj = jArray.getJSONObject(a);
		Comment comment = new Comment();
		comment.fromid = jObj.getLong("fromid");
		comment.time = new Date(jObj.getLong("time") * 1000);
		comment.message = jObj.getString("text");
		comment.id = jObj.getString("id");
		commentList.add(comment);
	    }
	}
	return commentList;
    }

    public ArrayList<Message> getThreadsInFolder() {
	return null;
    }

    /**
     * Retrieves userinfo based on class which extends BasicUserInfo.
     * 
     * @param <T>
     *            class that extends BasicUserInfo
     * @param uid
     *            userid
     * @param userInfo
     * 
     * @throws ClientProtocolException
     * @throws URISyntaxException
     * @throws IOException
     * @throws JSONException
     * @throws IllegalAccessException
     * @throws InstantiationException
     */
    public void getUserInfo(Long[] uids, ArrayList<Parameterable> userInfo, Class<? extends Parameterable> type)
	    throws ClientProtocolException, URISyntaxException, IOException, JSONException, InstantiationException,
	    IllegalAccessException {

	Map<String, String> listOfMethods = getBasicParams();

	if (uids == null || uids.length < 0) {
	    throw new IllegalArgumentException("");
	}
	StringBuffer userid = new StringBuffer();

	for (long uid : uids) {
	    userid.append(uid);
	    userid.append(',');
	}
	userid.deleteCharAt(userid.length() - 1);// delete last comma

	listOfMethods.put("uids", userid.toString());
	listOfMethods.put(METHOD, USERS_GETINFO);
	Parameterable basicInfo = type.newInstance();
	listOfMethods.put("fields", basicInfo.getFields());

	HttpResponseMessage response = f4j.sendGetRequest(listOfMethods);
	JSONArray jArray = new JSONArray(response.getResponse());
	int jArraySize = jArray.length();

	for (int a = 0; a < jArraySize; a++) {
	    JSONObject jObj = jArray.getJSONObject(a);
	    Parameterable bInfo = type.newInstance();
	    bInfo.setJSONObject(jObj);
	    userInfo.add(bInfo);
	}

    }
}
